Greetings all,

I have a small dual voltage welder 150 amp output @ 220v, 90 amp @ 110v, that I have used as a portable for a number of years. It is a great welder.

When I got it, I had it converted to a 110v plug by my partner(who is long gone), as it is used from regular 110 outlets all the time. I have lost the adapter plug that came with it.

I now would like to use the welder in my garage, I have a large project that has heavier material to TIG weld, and I would like the increased welding power from the 220v.

My house is newer, has a large 100 amp service box (88 feet away) with plenty of spaces open.

My garage currently has 1 - 110v 20amp GFI outlet and 1 -15 amp for the door lift.

I would like to add a 220v 20amp for my welder and 1- additional 20 amp for a saw.

The saw and the welder would NOT be used at the same time, this is just my garage.

I am prepared to run new 1/2"conduit across the basement. Is this large enough?

I am thinking of 12ga wire, 2 reds and a white, and a 20amp dual pole breaker in the service box.

Can I run both outlets off the same breaker?

How many wires do I need to run?

What type of outlet should I use?

Any advice would be appreciated.

Thanks in Advance,

Dean.

Need to know the AC I (current) Max value, and the duty cycle, and any other info listed on the nameplate of the welder.

Tkr:
The welder is a Miller Maxstar 150
It has the following info:

Duty Cycle Rating: 230 VAC TIG 100 amps @ 14 Volts-100%

Amperage Draw at the above rating 8.3 amps

Hope this is what you need.

Thanks

Dean.

For this unit a 20 amp circuit is fine, but for this distance I would use 3- #10 THHN copper wires pulled through the 1/2" EMT.

Use a NEMA 6-20R 20 Amp 250 volt 3 wire receptacle, with the T slot, will accept 15 Amp 250 volt plugs also.

You can have two outlets,one for each tool.